File with COS

zhaozj2021-02-16  71

File with COS

Author: Chen Wanfei

Implement file upload in JSP, a lot of available libraries, such as the famous JSPSMART SMARTupload, Struts is also available. I said COS, it is O'Reilly, O'Reilly book is very 8 wrong, this uploaded component is great, the most important thing is that it is Open Source.

Download the latest COS package (http://www.servlets.com/cos/index.html), join your ClassPath. Write a JSP that needs to upload files. For convenience, I use a simple HTM file. In this page, we let users upload 3 files at a time. /upload.htm No title document </ title> </ head> <body> <! - ENCTYPE value is important, UPLOAD.JSP is the process uploaded JSP -> <form name = "form1" method = "post" enctype = "multipart / form-data" action = "upload.jsp"> <p> <input name = "file1" TYPE = "file"> </ p> <p> <input name = "file2" type = "file"> </ p> <p> <input name = "file3" type = "file"> </ p> <p> <input type = "submit" name = "submit" value = "Upload"> </ p> </ form> </ body> </ html> in C: / Request a directory C: / Upload, Used to store the uploaded file. Write a JSP or servlet to upload, I use a UPLOAD.JSP here, so you don't have to configure web.xml, huh, it is more lazy.</p> <p>Upload.jsp <% @ page import = "java.io. *"%> <% @ page import = "com.oreilly.servlet.multipartRevent"%> <% @ page import = "com.oreilly.servlet.multipart. CoverFileresPolicy "%> <% @ page contenttype =" text / html; charset = GB2312 "%> <% // After upload, save in c: // upload string savedirectory =" c: // upload "; // Maximum 5M, up to 3 files, so ... int maxpostsize = 3 * 5 * 1024 * 1024; // Response encoding is "GB2312", using the default file name conflict resolution policy, implement MultipartRequest Multi = new MultipartRequest (request, saveDirectory, maxPostSize, "gb2312"); // output feedback Enumeration files = multi.getFileNames (); while (files.hasMoreElements ()) {System.err.println ( "ccc"); String name = (String) files.nextElement (); File f = multi.getFile (name); if (f = null!) {String fileName = multi.getFilesystemName (name); String lastFileName = saveDirectory "//" fileName; Out.println ("Uploaded file: lastfilename); out.println (" <hr> ");}}%> <meta http-equiv =" content-type "content =" text / html; charset = GB2312 "> Finally, the 2 files will be released to your server. Upload files will be done, you want to embed the function of sending attachments in your mail system, and use this to do it. Finally, I hope this article will inspire you, if there is a mistake, please criticize and correct!</p></div><div class="text-center mt-3 text-grey"> 转载请注明原文地址:https://www.9cbs.com/read-15030.html</div><div class="plugin d-flex justify-content-center mt-3"></div><hr><div class="row"><div class="col-lg-12 text-muted mt-2"><i class="icon-tags mr-2"></i><span class="badge border border-secondary mr-2"><h2 class="h6 mb-0 small"><a class="text-secondary" href="tag-2.html">9cbs</a></h2></span></div></div></div></div><div class="card card-postlist border-white shadow"><div class="card-body"><div class="card-title"><div class="d-flex justify-content-between"><div><b>New Post</b>(<span class="posts">0</span>) </div><div></div></div></div><ul class="postlist list-unstyled"> </ul></div></div><div class="d-none threadlist"><input type="checkbox" name="modtid" value="15030" checked /></div></div></div></div></div><footer class="text-muted small bg-dark py-4 mt-3" id="footer"><div class="container"><div class="row"><div class="col">CopyRight © 2020 All Rights Reserved </div><div class="col text-right">Processed: <b>0.033</b>, SQL: <b>9</b></div></div></div></footer><script src="./lang/en-us/lang.js?2.2.0"></script><script src="view/js/jquery.min.js?2.2.0"></script><script src="view/js/popper.min.js?2.2.0"></script><script src="view/js/bootstrap.min.js?2.2.0"></script><script src="view/js/xiuno.js?2.2.0"></script><script src="view/js/bootstrap-plugin.js?2.2.0"></script><script src="view/js/async.min.js?2.2.0"></script><script src="view/js/form.js?2.2.0"></script><script> var debug = DEBUG = 0; var url_rewrite_on = 1; var url_path = './'; var forumarr = {"1":"Tech"}; var fid = 1; var uid = 0; var gid = 0; xn.options.water_image_url = 'view/img/water-small.png'; </script><script src="view/js/wellcms.js?2.2.0"></script><a class="scroll-to-top rounded" href="javascript:void(0);"><i class="icon-angle-up"></i></a><a class="scroll-to-bottom rounded" href="javascript:void(0);" style="display: inline;"><i class="icon-angle-down"></i></a></body></html><script> var forum_url = 'list-1.html'; var safe_token = '8twf1CAgfR1QYKS6XlLK3_2F32l_2B3z3MZbcbqiaG23hpgDFJqTFp9UOiqPlLcEaRgq_2FjgESmPNY5OQUkPP9mCS3w_3D_3D'; var body = $('body'); body.on('submit', '#form', function() { var jthis = $(this); var jsubmit = jthis.find('#submit'); jthis.reset(); jsubmit.button('loading'); var postdata = jthis.serializeObject(); $.xpost(jthis.attr('action'), postdata, function(code, message) { if(code == 0) { location.reload(); } else { $.alert(message); jsubmit.button('reset'); } }); return false; }); function resize_image() { var jmessagelist = $('div.message'); var first_width = jmessagelist.width(); jmessagelist.each(function() { var jdiv = $(this); var maxwidth = jdiv.attr('isfirst') ? first_width : jdiv.width(); var jmessage_width = Math.min(jdiv.width(), maxwidth); jdiv.find('img, embed, iframe, video').each(function() { var jimg = $(this); var img_width = this.org_width; var img_height = this.org_height; if(!img_width) { var img_width = jimg.attr('width'); var img_height = jimg.attr('height'); this.org_width = img_width; this.org_height = img_height; } if(img_width > jmessage_width) { if(this.tagName == 'IMG') { jimg.width(jmessage_width); jimg.css('height', 'auto'); jimg.css('cursor', 'pointer'); jimg.on('click', function() { }); } else { jimg.width(jmessage_width); var height = (img_height / img_width) * jimg.width(); jimg.height(height); } } }); }); } function resize_table() { $('div.message').each(function() { var jdiv = $(this); jdiv.find('table').addClass('table').wrap('<div class="table-responsive"></div>'); }); } $(function() { resize_image(); resize_table(); $(window).on('resize', resize_image); }); var jmessage = $('#message'); jmessage.on('focus', function() {if(jmessage.t) { clearTimeout(jmessage.t); jmessage.t = null; } jmessage.css('height', '6rem'); }); jmessage.on('blur', function() {jmessage.t = setTimeout(function() { jmessage.css('height', '2.5rem');}, 1000); }); $('#nav li[data-active="fid-1"]').addClass('active'); </script>